Markus Armbruster
798af5b45b
Unlike POSIX sockets, Windows sockets are not file descriptors, but "OS handles", with a completely separate set of functions. However, Windows can create a file descriptor for a socket, and return a file descriptor's underlying handle. Use that instead of our gross hacks to keep up the illusion that sockets are file descriptors. Slightly dirty: we put file descriptors into fd_set. Works because both boil down to int. Change w32_select(), w32_socket(), w32_connect(), w32_recv(), w32_writev_socket(), w32_send() to take and return only file descriptors, and map to sockets internally. Replace w32_close_socket() by w32_close(), and drop the close() macro hackery that made tcp_connect(), host_connect() use w32_close_socket(). New fd_is_socket(). Windows provides select()-like functions only for handles. Because of that, the client used a handle for reading script files, and stored it in file descriptor input_fd. Drop this dirty hack, use a file descriptor instead. Works because we can get its underlying handle. Remove the dirty macro hackery that made play(), ring_from_file() and doexecute() unwittingly work with a handle. Remove w32_openhandle() and w32_close_handle(). Replace w32_readv_handle() by w32_readv_fd(). Update w32_select(). Remove w32_openfd(), it's not really needed. The old code stuffed WSA error codes into errno, which doesn't work. Use new w32_set_winsock_errno() to convert & stuff. Fix signed vs. unsigned warnings in Windows client. Move the struct sigaction replacement next to the sigaction() replacement. Rename sysdep_init() to w32_sysdep_init() for consistency.
307 lines
6.9 KiB
C
307 lines
6.9 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2009, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* sysdep_w32.c: system dependent functions for WIN32 environments
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*
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* Known contributors to this file:
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* Ron Koenderink, 2007
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* Markus Armbruster, 2009
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*/
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#ifdef _WIN32
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#include <errno.h>
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#include <fcntl.h>
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#include "misc.h"
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static int
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fd_is_socket(int fd, SOCKET *sockp)
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{
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SOCKET sock;
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WSANETWORKEVENTS ev;
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sock = W32_FD_TO_SOCKET(fd);
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if (sockp)
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*sockp = sock;
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return WSAEnumNetworkEvents(sock, NULL, &ev) == 0;
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}
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void
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w32_set_winsock_errno(void)
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{
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int err = WSAGetLastError();
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WSASetLastError(0);
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/* Map some WSAE* errors to the runtime library's error codes. */
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switch (err)
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{
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case WSA_INVALID_HANDLE:
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errno = EBADF;
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break;
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case WSA_NOT_ENOUGH_MEMORY:
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errno = ENOMEM;
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break;
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case WSA_INVALID_PARAMETER:
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errno = EINVAL;
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break;
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case WSAEWOULDBLOCK:
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errno = EAGAIN;
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break;
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case WSAENAMETOOLONG:
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errno = ENAMETOOLONG;
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break;
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case WSAENOTEMPTY:
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errno = ENOTEMPTY;
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break;
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default:
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errno = (err > 10000 && err < 10025) ? err - 10000 : err;
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break;
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}
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}
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/*
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* Get user name in the WIN32 environment
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*/
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struct passwd *
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w32_getpw(void)
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{
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static char unamebuf[128];
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static struct passwd pwd;
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DWORD unamesize;
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unamesize = sizeof(unamebuf);
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if (GetUserName(unamebuf, &unamesize)) {
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pwd.pw_name = unamebuf;
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if (unamesize == 0 || strlen(unamebuf) == 0)
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pwd.pw_name = "nobody";
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} else
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pwd.pw_name = "nobody";
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return &pwd;
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}
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/*
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* Initialize the WIN32 socket library and
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* set up stdout to work around bugs
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*/
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void
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w32_sysdep_init(void)
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{
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int err;
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WSADATA WsaData;
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/*
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* stdout is unbuffered under Windows if connected to a character
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* device, and putchar() screws up when printing multibyte strings
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* bytewise to an unbuffered stream. Switch stdout to line-
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* buffered mode. Unfortunately, ISO C allows implementations to
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* screw that up, and of course Windows does. Manual flushing
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* after each prompt is required.
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*/
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setvbuf(stdout, NULL, _IOLBF, 4096);
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err = WSAStartup(MAKEWORD(2, 0), &WsaData);
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if (err != 0) {
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printf("WSAStartup Failed, error code %d\n", err);
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exit(1);
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}
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}
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/*
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* POSIX compatible socket() replacement
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*/
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#undef socket
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int
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w32_socket(int domain, int type, int protocol)
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{
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SOCKET sock;
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/*
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* We have to use WSASocket() to create non-overlapped IO sockets.
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* Overlapped IO sockets cannot be used with read/write.
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*/
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sock = WSASocket(domain, type, protocol, NULL, 0, 0);
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if (sock == INVALID_SOCKET) {
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w32_set_winsock_errno();
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return -1;
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}
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return W32_SOCKET_TO_FD(sock);
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}
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/*
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* POSIX compatible connect() replacement
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*/
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#undef connect
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int
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w32_connect(int sockfd, const struct sockaddr *addr, int addrlen)
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{
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SOCKET sock = W32_FD_TO_SOCKET(sockfd);
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int result;
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result = connect(sock, addr, addrlen);
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if (result == SOCKET_ERROR) {
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/* FIXME map WSAEWOULDBLOCK to EINPROGRESS */
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w32_set_winsock_errno();
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return -1;
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}
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return result;
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}
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/*
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* POSIX compatible recv() replacement
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*/
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#undef recv
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int
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w32_recv(int sockfd, void *buffer, size_t buf_size, int flags)
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{
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SOCKET socket = W32_FD_TO_SOCKET(sockfd);
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int result;
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result = recv(socket, buffer, buf_size, flags);
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if (result == SOCKET_ERROR) {
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w32_set_winsock_errno();
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return -1;
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}
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return result;
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}
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/*
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* POSIX compatible writev() replacement specialized to sockets
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* Modelled after the GNU's libc/sysdeps/posix/writev.c
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*/
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ssize_t
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w32_writev_socket(int sockfd, const struct iovec *iov, int iovcnt)
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{
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SOCKET sock = W32_FD_TO_SOCKET(sockfd);
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int i;
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char *buffer, *buffer_location;
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size_t total_bytes = 0;
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int bytes_written;
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for (i = 0; i < iovcnt; i++)
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total_bytes += iov[i].iov_len;
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buffer = malloc(total_bytes);
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if (buffer == NULL && total_bytes != 0) {
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errno = ENOMEM;
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return -1;
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}
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buffer_location = buffer;
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for (i = 0; i < iovcnt; i++) {
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memcpy(buffer_location, iov[i].iov_base, iov[i].iov_len);
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buffer_location += iov[i].iov_len;
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}
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bytes_written = send(sock, buffer, total_bytes, 0);
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free(buffer);
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if (bytes_written == SOCKET_ERROR) {
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w32_set_winsock_errno();
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return -1;
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}
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return bytes_written;
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}
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/*
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* POSIX compatible send() replacement
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*/
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int
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w32_send(int sockfd, const void *buffer, size_t buf_size, int flags)
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{
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SOCKET socket = W32_FD_TO_SOCKET(sockfd);
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int result;
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result = send(socket, buffer, buf_size, flags);
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if (result == SOCKET_ERROR)
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w32_set_winsock_errno();
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return result;
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}
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/*
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* POSIX compatible close() replacement
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*/
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int
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w32_close(int fd)
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{
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SOCKET sock;
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if (fd_is_socket(fd, &sock)) {
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if (closesocket(sock)) {
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w32_set_winsock_errno();
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return -1;
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}
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/*
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* This always fails because the underlying handle is already
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* gone, but it closes the fd just fine.
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*/
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_close(fd);
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return 0;
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}
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return _close(fd);
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}
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/*
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* POSIX compatible readv() replacement specialized to files.
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* Modelled after the GNU's libc/sysdeps/posix/readv.c
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*/
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ssize_t
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w32_readv_fd(int fd, const struct iovec *iov, int iovcnt)
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{
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int i;
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char *buffer, *buffer_location;
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size_t total_bytes = 0;
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int bytes_read;
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size_t bytes_left;
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for (i = 0; i < iovcnt; i++) {
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total_bytes += iov[i].iov_len;
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}
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buffer = malloc(total_bytes);
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if (buffer == NULL && total_bytes != 0) {
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errno = ENOMEM;
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return -1;
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}
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bytes_read = read(fd, buffer, total_bytes);
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if (bytes_read < 0)
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return -1;
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bytes_left = bytes_read;
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buffer_location = buffer;
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for (i = 0; i < iovcnt; i++) {
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size_t copy = MIN(iov[i].iov_len, bytes_left);
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memcpy(iov[i].iov_base, buffer_location, copy);
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buffer_location += copy;
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bytes_left -= copy;
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if (bytes_left == 0)
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break;
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}
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free(buffer);
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return bytes_read;
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}
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#endif /* _WIN32 */
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